Supersonic jet-synchronous scan luminescence spectrometry of naphthalene derivatives

Abstract

Supersonic jet-synchronous scan luminescence (SSJ-SSL) spectrometry provides a simple spectrum, as a single component gives a single peak in most instances. In this approach resonance fluorescence from the zero-point level of the S₁ state is assumed to be dominant. However, there are some exceptions to this assumption. For example, naphthalene, the electronic transition of which is forbidden, provides strong vibronic bands in the spectrum. Even for a molecule such as naphthalene, SSJ-SSL spectrometry is considered to be useful for simplification of the spectrum, as only or two major peaks are obtained. The method was applied to a dimethylnaphthalene mixture and a heat-exchange oil, which were supplied as unknown samples.